Oil burner



I. J. FOLTZ April 7, 1925.

OIL BURNER Filed Dec. 13, 1925 Md m 2 pm v Patented Apr. 7, 1925.

STATES 1,5323% ATE? FFECE.

IRVING J. FOLTZ, DECEASED. LATE F SEATTLE, WASHINGTON, BY FLORENCE O.FOLTZ, EXECUTE-IX, OF SEATTLE, WASHINGTON.

V OIL BURNER.

Application filed December 13, 1923. Serial No. 680,316.

To all whom it may concern:

Be it known that IRVING J. Fon'rz, de-

. ceased, late a citizen of the United States,

and resident of the city of Seattle, in the county of King and State oflVashington, did invent certain new and useful Improve ments in OilBurners, of which the following is a specification. Y

E ly invention relates to burners of the type which are intended forburning oil,

and particularly a medium or heavy grade of oil, and for such purposesas heating of furnaces, and such other purposes where the capacity formaking of a flame of consider- ]5 able size and heating possibilities isdesirable.

The object of my invention is to make a burner which will eficientlyhandle such oil for the purposes mentioned, and further, specifically tomake such a burner having the capacity for being regulated so as to burna very small amount of oil with a consequent reduction in the heatingcapacity.

The novel features of my invention will be hereinafter specificallypointed out in the claims.

The accompanying drawings show my invention in the form of constructionwhich I now prefer to use.

Figure 1 is a longitudinal section through the burner upon a centralvertical plane, and Figure 2 is a corresponding section on thehorizontal plane.

The main body of this burner consists of a tubular body 1, havingmounted within and concentric therewith a central pipe or tubular body3. These may be separate members or may be connected integrally as bytwo or more plugs or webs 30. An air delivery pipe as 8 is connected tothe outer end of the larger tubular member 1. This pipe 8 is supposed tobe supplied with air under pressure. This pressure need not be verygreat, but should be sufiicient to produce a draft through the burner ofsuiticient strength to somewhat atomize the oil fed thereto even whenthe burner is turned down low.

In the construction illustrated in the drawings, the two concentrictubular members l and 3 are supposed to be different parts of the samecasting. The inner tube.

3, which is the oil atomizing tube preferably has its inner or dlschargeend 31 interiorly shaped as an expandmg cone, that is a cone with thelarge end towards the flame. The outer member 1 is preferably alsosomewhat contracted around the discharge'end of the inner tube 3. Thismay be effectively and conveniently done by providing the innerordischarge end thereof with a detachable ring a having a flange 40 whichextends towards the center so as to provide a relatively reduced annulardischarge opening between the same and the tube 3. Preferably the flange40 which determines the outer diameter of the supplemental air dischargeorifice, is located slightly backward or towards the outside from theextreme inner end of the atomizing tube 3. The ring 1 is shown assecured in place upon the outer tube 1 by a set screw as 42. It is alsoprovided with a ledge -1 extending horizontally from its lower side, towhich is connected a plate 50, which is cupped enough to retain in itsupper surface a plate 5' of some refractorymaterial, preferably amaterial made from some clay product.

This plate 5 will become highly heated by the flame issuing from theburner nozzle. hen so highly heated it is possible to re duce the supplyof oil to a very low amount, thus producing only a very small flame.This possibility arises from the fact that the highly heated body 5 willfunction substantially the same as a pilot flame, so as to maintain theheating flame ignited even when it is turned down to a minimum.

One of the webs 30 by which the atomizing tube 3 is held in position isprovided with a bore 61 leading to the outside of the tube 1. A. lugprovided on the outside of this tube is also provided with a boreintersecting the bore 61 with which is connected the oil supply pipe 6.p

' The burner as a whole, consisting of the inner and outer tubes 1 and 3and the ports carried thereby, is mounted upon aplate 10 to which it maybe detachably secured by means of side lugs 11 and bolts passingtherethrough. The outer end of the tube 1 may be provided with anenlarged flange or cup-shaped member 2 to which the air supply pipe 8 isconnected. A metal casing 7 is preferably mounted upon the outerperiphery of the plate 10 and of such a length as to correspond with thewall in which the burner is mounted. This forms a convenient way'ofmounting the burner and of providing a suitable chamber, which isconnected with; but not apart of the furnace chamber. The burner is thusaiseinhled as a unit and may he mountee in the wallby any ordinaryWorkman;

I have found that the above burner, while being effective in producinglarge quanti ies of heat when supplied with a quantity of oil, is alsocapableof being regulated down to a very small flame Without danger ofthe flame beingextinguished. The oil which trihutes towards perfectcombustion.

One advantage of making the flange L0 as part of the ring 4, which isseparate from the tubular members 1 and 23, is that it-inay be adjustedaxially relative to the latter. By-moidng the flange l0 outwardly of thedischarge end 81 of the tube 3, the

a-ir'currents issuing from the end 31 and flange 4O Will-heaffected "insuch manner as to cause spreading of the oil spray, and thusto-sp'readthe flame; Movement of the flange 4:0 in the opposite direction will actdecrease the spread in the reverse manner to of the flame.

hat I claim as my invention is:

1. An oil burner having an inner tube and means for disehargir; oiltherein-to from one side, a concentric surrounding tube spaced therefromto form an a; passage, the outer Wall of said annuia sage being at itsouter end reduced diameter and terminating just ht outer discharge endofthe inner t a common air supply eennectien said tubes.

2. In an oil burner, an inner and a tube integrally secured to form ana? i passage between then). an oil supply pipe discharging at the topside of the inner tuhe the bore of the discharge end of the inner tubebeing enlai ed to reduce the Walls thereof to a thin eege at-its end,and a cap fitting the di charge end of the outer tube and restrictingthe annular passage at jacent to thediseharge end oi the inner tuhe, anda oonnnon air supply connection to both tubes.

Signed at Seattle, King County, Washington this 2nd day of November,1923.

FLORENCE 0. FOLTZ, Escecutr'm 0f lrvmg J Foltz, deceased.

